Air-cooled hollow slag-pocket.



G. L. DANFCRTH, JR. & S. NMSMITH. AIR COOLED HOLLOW SLAG POCKET.

FILED JAN. 24

' Patented May 2,1916.

2 SHEETS-SHEET I.

I I mm G. L. DANFORTH, JR. & S. NAISMITH. AIR COOLED HOLLOW SLAG POCKET.

' APPLICATION FILED JAN. 24. 1916. 1,181,374.

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Patented May 2, 1916.

2 SHEETS-SHEET 2.

an s'rn'rns Parana @FIEQE.

GEORGE L. DANFOBTH, JR, AND SAMUEL NAISMITH, OF CHICAGO, ILLINOIS.

AIR-COOLED HOLLOW SLAG-POCKET.

To all whom it may concern Be it known that we, GEORGE L. DAN- 'Fon'rH, Jr., and SAMUEL 'NAISMITH, citizens of the United States, and residents of Chicago, in the county of Cook and State of Illinois,- have invented certain new and useful Improvements in Air-Cooled Hollow the melted brickwork from above and to -in-- tercept the fine particles of dolomite, limestone, ore, silica, etc., carried over by the gases in their passage to the checker chambers. They also serve in some cases to take the slag should the heat of steel in furnace boil or froth excessively. By the use of slag pockets there is avoided the constant clean ingout of the checkerwork that would I otherwise be necessary.

Slagpockets are arsdurce of great trouble in'every furnace, yet a furnace cannot be operated successfully without them.

'An object of our invention isto keep the bottoms of the slag pockets cool by circulating air under a false bottom in the slag pockets. We obtain this circulation of cold air by providing flues or any kind of opening lgeneath the false bottom of the slag .pockets and by connecting. said flues, or

openings, with a stack or other means of inducing the necessary draft; In this way the bottom of the slag pocket is cooled and the slag contained therein, instead of remaining liquid and undermining the slag pocket walls, allowing the same to sag and open at the brick joints, is chilled and has been found to form in thin layers. It is much more readily removed than when it remainsliquid to a considerable depth and finally chills in very thick layers. that strongly adhere to the slag pocket' walls when the slag is liquid.

By our invention there is accomplished two material improvements; first, the walls of the slag pockets are maintained in much better condition, and, secondly, the accumulated slag is finally removedat much less ex- Specification of Letters Patent.

pense and with less lost time in the furnace operation. r

Our invention further comprises the details of construction and arrangement of parts hereinafter described and claimed, reference being had to the accompanying u; drawings, in which: the following is a Figure 1 is a vertical section on the line 11 of Fig. 2 through the gas and' air slag Patented May 2, 191116.

Application filed January 24, 1916. Serial No. 73,871.

pockets on one end of an open hearth furnace equipped with our inyention; Fig. 2

is a longitudinal section through the air slag-pocket, and Fig. 3 is a horizontal section" through the slag pocketson'one end of the'furnace (the opposite end being the; theLfime same the section being taken on 3-3 of Fig. 2.)

We have illustrated our invention in con nection with an open hearth furnace equipped with a gas port 4, havingan' air port 5 on each side of it, separated by a 5 brick wall 6. These ports and downtakes lead from the furnace proper -.to the slag pockets'8.

In the formpreferred to be shown we form a false bottom 9 in the" lower portions of the'slag pockets 8, by providing plates 11 y g bricks let into thebwalls ,12. To

furnish additional support'to the'floor 9,-we form a wall 10 extending through the central portion of the slag pockets-butterminating short of the-.bridge. wall117, sepa rating the slag pockets 8. from the -checker chambers 8. At the other end,- thew'allilO is joined to the wall 12, thusforming substantially two'compartments,.'or; fines, 15 in" the bottom of every slag pocket. For ores ating a circulation of air throughthecom- 'partments l5,' 'we prefer to employ inlet plpes 13, directed to discharge through ducts 13 in'wall 12, into the compartments 15.

These'pipes 13 at the other ends are open to the atmosphere, as best shown in Fig. 2. Connected into the other compartments 15" areexhaust pipes 14 connected to a chimney 145*, which causes a draft through the comflpartments at all times, as indicated by the arrows in Fig. 3. For cleaning out the slag pockets 8, .entrance is gained through the pen" end 16,-which maybe closed by a bulkhead (not; shown )L.

, Th -will be observed that we have proyided an arrangement whereby the molten slag is quickly cooled in the slag pockets and. eonsequently have made possible the quick and easy cleaning of the pockets. Thus the cutting away of the walls forming the pockets pockets provided with false bottoms, Walls.

extending longitudinally of said pockets under said bottoms, thereby providing a plurality of fiues, and means for circulating air underneath said bottoms, substantially as described.

2. The combination with open hearth furnaces and the like, of slag pockets provided with elevated bottom walls,v intermediate walls supporting said bottoms and extending longitudinally of said pockets forming fines, air connections to said fines and means for causing circulation of air therethrough, substantially as described.

3. In combination with open hearth flirnaces and the like, of walls forming slag pockets, said pockets'being provided with raised bottoms, ,ribs supporting said bottoms and extending longitudinally of said pockets, and at one end joined to one of the walls of said pockets forming fiues, air inlets connected to one set of flues and exhaust pipes connected to the other set of fiues, substantially as described.

4. The combination with a metallurgical furnace, of Walls forming a slag pocket, the wall forming the floor of said pocket being provided with a conduit, and means for circulating a cooling medium through said conduit, Wherebyfiuid material deposited in said pocket is quickly cooled and prevented from causing deterioration of said Walls, substantially as described.

Signed at Chicago, Illinois, this 15th day of January,-1916. v GEORGE L. -DANFORTH, J R. SAMUEL NAI SMITH. Witnesses:

M. J. DEVANEY, A. F. WHITE.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of intents,-

Washington, D. G. 

